Project system ran into an unexpected problem, please report it to the product team

[julioct]

Type: Bug

1. Create a .NET Aspire solution
2. Using solution explorer, add to the solution one or more projects that live outside of the repo where the .NET Aspire solution lives.

For instance, .NET Aspire solution is here: "D:\projects\GameStore\aspire\aspire.sln"

But it references this project (among many others): "D:\projects\GameStore\catalog\src\Catalog.Service\Catalog.Service.csproj"

3. Close VS Code
4. Open .NET Aspire solution in VS Code

EXPECTED

No issues

ACTUAL

You get this:

8/27/2024 1:19:00 PM LimitedFunctionality System.AggregateException: Project system data flow 'Workspace update handler 12216869' closed because of an exception: Object reference not set to an instance of an object.. (Object reference not set to an instance of an object.) ---> (Inner Exception #0) StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object. at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](RequestId id, String targetName, IReadOnlyList1 arguments, IReadOnlyList1 positionalArgumentDeclaredTypes, IReadOnlyDictionary2 namedArgumentDeclaredTypes, CancellationToken cancellationToken, Boolean isParameterObject) at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.<>c__DisplayClass6_0.<<HandleProjectChangeAsync>g__ProcessAdditionsAsync|4>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.HandleProjectChangeAsync(IWorkspaceProject context, IComparable version, IProjectChangeDescription projectChange, ContextState state, ITelemetryOperation telemetryOperation, IManagedProjectDiagnosticOutputService logger) at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.HandleAsync(IWorkspaceProject context, IComparable version, IImmutableDictionary2 projectChanges, ContextState state, ITelemetryOperation telemetryOperation, IManagedProjectDiagnosticOutputService logger) at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>cDisplayClass43_1.<gProcessSourceItemsHandlersAsync|6>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>cDisplayClass43_0.<gApplyProjectEvaluationAsync|2>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>cDisplayClass46_1`1.<gApplyInBatchAsync|1>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.<>cDisplayClass3_0.<b0>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.ExecuteAsync(Func1 operation, CancellationToken cancellationToken) at Microsoft.VisualStudio.ProjectSystem.OnceInitializedOnceDisposedUnderLockAsync.ExecuteUnderLockCoreAsync(Func2 action, CancellationToken cancellationToken) at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.OnEvaluationUpdateAsync(IProjectVersionedValue1 evaluationUpdate) at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>b__0>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.<>c__DisplayClass3_0.<<ExecuteAsync>b__0>d.MoveNext() --- End of stack trace from previous location --- at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.ExecuteAsync(Func1 operation, CancellationToken cancellationToken) at Microsoft.VisualStudio.ProjectSystem.OnceInitializedOnceDisposedUnderLockAsync.ExecuteUnderLockCoreAsync(Func2 action, CancellationToken cancellationToken) at Microsoft.VisualStudio.ProjectSystem.DataReceivingBlockSlim1.ProcessInputQueueAsync(InputDataBuffer inputQueue) <--- (Inner Exception #0)

Extension version: 1.9.55 VS Code version: Code 1.92.2 (fee1edb8d6d72a0ddff41e5f71a671c23ed924b9, 2024-08-14T17:29:30.058Z) OS version: Windows_NT x64 10.0.22631 Modes:

System Info

|Item|Value| |---|---| |CPUs|12th Gen Intel(R) Core(TM) i9-12900KF (24 x 3187)| |GPU Status|2d_canvas: enabled
canvas_oop_rasterization: enabled_on
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
skia_graphite: disabled_off
video_decode: enabled
video_encode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled
webgpu: enabled
webnn: disabled_off| |Load (avg)|undefined| |Memory (System)|31.86GB (11.68GB free)| |Process Argv|. --crash-reporter-id aff229d3-980e-4032-bb77-54a44e5e6df7| |Screen Reader|no| |VM|0%|

A/B Experiments

``` vsliv368:30146709 vspor879:30202332 vspor708:30202333 vspor363:30204092 vscod805cf:30301675 binariesv615:30325510 vsaa593cf:30376535 py29gd2263:31024239 c4g48928:30535728 azure-dev_surveyone:30548225 2i9eh265:30646982 962ge761:30959799 pythongtdpath:30769146 welcomedialogc:30910334 pythonnoceb:30805159 asynctok:30898717 pythonregdiag2:30936856 pythonmypyd1:30879173 h48ei257:31000450 pythontbext0:30879054 accentitlementst:30995554 dsvsc016:30899300 dsvsc017:30899301 dsvsc018:30899302 cppperfnew:31000557 dsvsc020:30976470 pythonait:31006305 dsvsc021:30996838 bdiig495:31013172 pythoncenvpt:31062603 a69g1124:31058053 dvdeprecation:31068756 dwnewjupytercf:31046870 newcmakeconfigv2:31071590 impr_priority:31102340 refactort:31108082 pythonrstrctxt:31112756 wkspc-onlycs-t:31111718 wkspc-ranged-t:31125599 pme_test_c:31118331 fje88620:31121564 aajjf12562:31125793 ```

[tmeschter]

Moving to area-roslyn as the exception is coming from the language service.

[julioct]

I can no longer repro this issue after switching to the C# extension release version.

[julioct]

This started happening again once I upgraded C# extension to v2.45.20.

[dibarbet]

@julioct can you check if 2.45.25 fixes the issue?

[julioct]

@dibarbet Just tried it, same issue. Going back to v2.39.29 fixes it.

=====================
9/18/2024 11:19:48 AM
LimitedFunctionality
System.AggregateException: Project system data flow 'Workspace update handler 13404976' closed because of an exception: Object reference not set to an instance of an object.. (Object reference not set to an instance of an object.)
---> (Inner Exception #0) StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.
   at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](RequestId id, String targetName, IReadOnlyList`1 arguments, IReadOnlyList`1 positionalArgumentDeclaredTypes, IReadOnlyDictionary`2 namedArgumentDeclaredTypes, CancellationToken cancellationToken, Boolean isParameterObject)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.<>c__DisplayClass6_0.<<HandleProjectChangeAsync>g__ProcessAdditionsAsync|4>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.HandleProjectChangeAsync(IWorkspaceProject context, IComparable version, IProjectChangeDescription projectChange, ContextState state, ITelemetryOperation telemetryOperation, IManagedProjectDiagnosticOutputService logger)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.HandleAsync(IWorkspaceProject context, IComparable version, IImmutableDictionary`2 projectChanges, ContextState state, ITelemetryOperation telemetryOperation, IManagedProjectDiagnosticOutputService logger)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass43_1.<<OnEvaluationUpdateAsync>g__ProcessSourceItemsHandlersAsync|6>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass43_0.<<OnEvaluationUpdateAsync>g__ApplyProjectEvaluationAsync|2>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass46_1`1.<<OnProjectChangedAsync>g__ApplyInBatchAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.<>c__DisplayClass3_0.<<ExecuteAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.ExecuteAsync(Func`1 operation, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.OnceInitializedOnceDisposedUnderLockAsync.ExecuteUnderLockCoreAsync(Func`2 action, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.OnEvaluationUpdateAsync(IProjectVersionedValue`1 evaluationUpdate)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.<>c__DisplayClass3_0.<<ExecuteAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.ExecuteAsync(Func`1 operation, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.OnceInitializedOnceDisposedUnderLockAsync.ExecuteUnderLockCoreAsync(Func`2 action, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.DataReceivingBlockSlim`1.ProcessInputQueueAsync(InputDataBuffer inputQueue)
<--- (Inner Exception #0) 
===================
9/18/2024 11:19:48 AM
LimitedFunctionality
System.AggregateException: Project system data flow 'Workspace update handler 60769946' closed because of an exception: Object reference not set to an instance of an object.. (Object reference not set to an instance of an object.)
---> (Inner Exception #0) StreamJsonRpc.RemoteInvocationException: Object reference not set to an instance of an object.
   at StreamJsonRpc.JsonRpc.InvokeCoreAsync[TResult](RequestId id, String targetName, IReadOnlyList`1 arguments, IReadOnlyList`1 positionalArgumentDeclaredTypes, IReadOnlyDictionary`2 namedArgumentDeclaredTypes, CancellationToken cancellationToken, Boolean isParameterObject)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.<>c__DisplayClass6_0.<<HandleProjectChangeAsync>g__ProcessAdditionsAsync|4>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.HandleProjectChangeAsync(IWorkspaceProject context, IComparable version, IProjectChangeDescription projectChange, ContextState state, ITelemetryOperation telemetryOperation, IManagedProjectDiagnosticOutputService logger)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Handlers.DynamicItemHandler.HandleAsync(IWorkspaceProject context, IComparable version, IImmutableDictionary`2 projectChanges, ContextState state, ITelemetryOperation telemetryOperation, IManagedProjectDiagnosticOutputService logger)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass43_1.<<OnEvaluationUpdateAsync>g__ProcessSourceItemsHandlersAsync|6>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass43_0.<<OnEvaluationUpdateAsync>g__ApplyProjectEvaluationAsync|2>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass46_1`1.<<OnProjectChangedAsync>g__ApplyInBatchAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.<>c__DisplayClass3_0.<<ExecuteAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.ExecuteAsync(Func`1 operation, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.OnceInitializedOnceDisposedUnderLockAsync.ExecuteUnderLockCoreAsync(Func`2 action, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.OnEvaluationUpdateAsync(IProjectVersionedValue`1 evaluationUpdate)
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>g__ApplyUpdateWithinLockAsync|1>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.ProjectSystem.VSCode.LanguageServices.Workspace.<>c__DisplayClass42_0.<<OnWorkspaceUpdateAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.<>c__DisplayClass3_0.<<ExecuteAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.VisualStudio.Threading.ReentrantSemaphore.StackSemaphore.ExecuteAsync(Func`1 operation, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.OnceInitializedOnceDisposedUnderLockAsync.ExecuteUnderLockCoreAsync(Func`2 action, CancellationToken cancellationToken)
   at Microsoft.VisualStudio.ProjectSystem.DataReceivingBlockSlim`1.ProcessInputQueueAsync(InputDataBuffer inputQueue)
<--- (Inner Exception #0) 
===================

[dibarbet]

@julioct can you collect the 'C#' output window logs as described here when you hit the issue? https://github.com/dotnet/vscode-csharp/blob/main/SUPPORT.md#collecting-general-logs